Management Summary The goal of our diploma thesis is to analyse the Wide Area Network (WAN) of the Rhenus Logis-tics AG Switzerland. The following questions are answered in this documentation:

What is the average utilisation of certain links? (WAN-link in Basel, Schaffhausen, Spreitenbach and Zurich, VPN-Tunnel from Basel to Dortmund) The average utilisation of all measured links (VPN-link inclusive) compared to the maximal possi-ble bandwidth is quite low. An increasing of the bandwidth does not seem to be necessary. The bandwidth of the WAN-Link in Basel could even be reduced.

What is the maximal possible bandwidth of the WAN-Links? The maximal possible bandwidth of the mentioned WAN-links is matching with the bandwidth-values agreed on.

Which processes should be favoured, eliminated or rescheduled? There is no urgent need to eliminate unwanted applications (e.g. MSN Messenger, Webradio) as they play an unimportant part in the rest of the general traffic. The existence of IPv6 Data packets and various other protocols is much more alarming and motivates to question its necessity. During our analysis, no processes were found which had charged the WAN-link in such a way that a re-scheduling of them would have been necessary. A lot of processes for example the synchronisation of the mail servers, backups, software distribution already happen during low frequented times.

What kind of Data packets could be distributed by IP-Multicasting? During the WAN-Analysis no traffic was found which could be concentrated in a bandwidth-saving way. IP Multicasting is already in use for the communication between the Cisco compo-nents.

Which protocols and applications are occupying the WAN-links and VPN-link? The most common protocol is the CIFS/SMB for File sharing. This means that most traffic on the WAN is produced by File transfers. Firewall blocks most known Internet-Attacks

During the whole WAN-Analysis no common Internet Attacks where seen on the WAN.